Cheapest priced copy (Gatecrash): $0.49 at Card Kingdom, near mint, their price list as of .
Firemane Avenger 
Creature — Angel · 3/3 · Rare · Ravnica: Clue Edition · #189
Flying
Battalion — Whenever this creature and at least two other creatures attack, this creature deals 3 damage to any target and you gain 3 life.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.49 to $4.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ravnica: Clue Edition | 189 | Rare | $0.59 | — |
| GRN Guild Kit | 89 | Rare | $0.59 | — |
| Gatecrash | 163 | Rare | $0.49 | $1.49 |
| Gatecrash Promos | 163 | Rare | — | $4.49 |
5 rulings from Wizards of the Coast
- 24 January 2013If Firemane Avenger's battalion ability resolves but some or all of the damage is prevented, you'll still gain 3 life.
- 24 January 2013If the target permanent or player is an illegal target when Firemane Avenger's battalion ability tries to resolve, the ability won't resolve and none of its effects will happen. You won't gain life.
- 15 April 2013Once a battalion ability has triggered, it doesn't matter how many creatures are still attacking when that ability resolves.
- 15 April 2013The effects of battalion abilities vary from card to card. Read each card carefully.
- 12 January 2024The three attacking creatures don't have to be attacking the same player, planeswalker, or battle.